well, maybe is just your bad luck, I did mine in Bandar Selayang Baru (BBS), find a guy name Alex... responsible mechanic...

i had same experience with assholes Mechanic...
My car can't seem to accelerate much, no matter how much pressure I step on it, the car still no kick..

I went to the workshop and ask why, then one head of mechanic with his bulldog face (referring to same branch at BBS) told me it was my tire problem, cheap tires, then say it's my break pad as well... I kept silent and ask him to suggest, he ask me to change my tires, breakpad and overhaul my engine. which cost more then RM 6000.00.

I was like No way, crazy...

end of the long story, one mechanic name Alex look at my car, test drive with me, and honestly telling me that... he don't really know what was the problem too, but should try to slowly rectify. so he told me to change my engine oil, (I just changed mine within 1 month) but looking at the cost of rectifying the problem is about RM 180.00. I go with it.

End of day, just because the engine oil was the issue, it was still see thru quality, but somehow it affected the engine.

Moral of story, get a trusted Mechanic and let them help you check.
Do 2 - 3 checking and never tell the new mechanic your issue else they will base on the facts you given and they will act upon it.

You can also write to Lim tayer management and launch a report.